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Diffstat (limited to 'mathcomp/ssrtest/tacnotationpattern.v')
| -rw-r--r-- | mathcomp/ssrtest/tacnotationpattern.v | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/mathcomp/ssrtest/tacnotationpattern.v b/mathcomp/ssrtest/tacnotationpattern.v new file mode 100644 index 0000000..13de4bc --- /dev/null +++ b/mathcomp/ssrtest/tacnotationpattern.v @@ -0,0 +1,14 @@ +Require Import mathcomp.ssreflect.ssreflect. +Tactic Notation "at" ssrpatternarg(p) tactic(t) + := + ssrpattern p; let top := fresh in intro top; + t top; try unfold top in * |- *; try clear top. + +Goal forall x y, x + y = 4. +intros. +at [RHS] (fun top => remember top as E eqn:E_def). +match goal with +| |- x + y = E => idtac +| |- _ => fail +end. +Admitted. |